I am unable to open and copy the file encrypted after formatting my computer

I just format my computer before formatting, I take any backup of the drive c. but 1 file is encrypted on my backup now, I'm unable to decrypt this file and is also impossible to copy and open this folder. Please help me with this.

I assume you have XP Pro and that you encrypted files by using the Encrypting File System (EFS).  When you use EFS, the these files decryption key is stored encrypted with your certificate store.  When you use EFS, you * MUST * back up your certificates or risk permanently losing access to your encrypted files.  Details are provided in this article which is required reading if you use EFS:

"Best Practices for encrypting file system"
  <>http://support.Microsoft.com/kb/223316 >

Jump down to the paragraph "why you should back up your certificates.
Line background here, is that you have two options to recover the access to these files.  The first is to restore your certificate from the backup of the certificate that you created by the article above before you reformat your computer.  The second option is to completely restore your previous system from a backup of the image-style you did your system before reformatting and reinstalling.  Otherwise, I fear that you have permanenty lost access to these files.

EFS is affectionately known as the 'Recycle Bin delay' in this forum.

Sorry,
JW

Tags: Windows

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